Feed-water heater for locomotive-boilers.



l. DNARVARTE, Nu. FEED WATER HEATER FOR LOCOMOTIVE BOlLERS. APPucATmN HLED AuG.26.191s.

Patented Apr. 24, 19173` 32 SHEETs-SHEET x.

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I. DNARVARTE, N. C. FEED WATER HEATER EUR LOCOMOTIVE BOILERS. AAPPLICATION min M1616. 1916.

1,223,373. Patented Apr. 24, 19N.

2 SHEETS*SHEET 2.

SESTAVAzLAsLE @Gpl UNITED STATES lPATENT oEEIoE.

JUAND'NARVARTE, N. c., or HACIENDA LAREDO, TRUXILLO, PERU.

" To all whom t may concern '.Heaters for Be it known that I, JUAN DNARVARTE,

`N. G., citizen of Peru, residing at Hacienda Laredo., Truxillo, Peru, have invented new and useful Improvements in .Feed-lVatcr Loeoinotive-Boilers, of whichv the following is a specification.

Myiinvention relates to feed water heaters for steam boilers, particularly boilers of the fire tube or locomotive type.

An object of my invention is to provide a feed water heater in which both heat from the flue gases and heat from the exhaust steam from the cylinders may be used for heating the boiler feed water. A further object is to provide a heater of extremely simple and durable construction. A further object is to provide separate passages for the exhaust steam from each cylinder passing through the heater to the exhaust steam nozzle, in order to reduce the resistanceto the passage of the exhaust steam to a minimum. A further object iste Yprovide means for etliciently guiding the tlue gases against the heat transferring surfaces of the feed water chamber.

My invention consists in the. construction, combination, and arrangement of parts as herein illustrated, described and claimed.

One form of construction embodying my invention is shown in the accompanying' drawings in which the same reference characters designate corresponding parts in all the figures, and in which,

Figure 1 is a vertical transverse section through the smoke. box of the boiler taken approximately on .line 1-1 of Fig. 2 looking in the direction of the arrow:

Fig. 2 is a central vertical longitudinal section of the forward pa rts of a boiler titted with the heater; and

Fig. is a horizontal section mately on the line 3-3 of Fig. 2.

Referring to the accompairving drawings. the boiler 1 has tire tubes 2. through which the gases pass in the usual manner from the iire box (not shown) to the smoke box Il on their way lo the stack t, lartly encircling the smoke box I, is provided a passage or chamber which is formed preferably with the metal of the smoke. box as an inner wall, and with a metal sheet or plate t3 welded, riveted 0r otherwise rigidly secured to thel shell of the `smoke box to make a water tight connection. the water in the chamber will be under boiler pressure,

approxi- Spe'cification of Letters Patent.

Application led Angust 26, 1916.

FEED-WATER HEATER FOR LOCOMOTIVE-BOILERS Patented Apr. 24, 1917. Serial No. 117,113.

it is preferable to provide stays 7 to maintain the walls of the chamber rigidly spaced. At the bottom of the chamber 5 at each side are provided connections S through which the water is ledinto the chamber 5 from the pipe 9 to which it is delivered by the injectors or pumps (not shown). F rom the upper part of the passage 5, there is' provided a connection 1t), having therein a check valve 11, through which the water, after being heated, is admitted to the boiler 1.

Surrounding the water chamber 5 is provided a steam chamber 12 which isy preferably of double construction so as to form two annular passages each of approximately half the width of the water passage 5. These passages are preferably formed with the inner wall integral with the outer wall (5 of the water chamber 5and with an outer wall 18 which is steam tight, but may readily be removed should vcalking of the water chamber be necessary. The steam chamber 12 may be enveloped with asbestos o1 other heat insulating material 261 The. steam from the boiler is led through the pipes 1l to the cylinders 15 and 1G.' From the cylinder 15 the exhaust steam passes by the pipe 17 into the forward portion of the chamber 12, through which it passes to the other side of the boiler where it is led through the pipe 19 to the exhaust nozzle 21. The exhaust steam from the other cylinder, 16 passes through the pipe 1S to the rear division of the chamber 12, and around theI smoke box in the opposite direction. to the pipe 20 by which it is led to the exhaust: nozzle 21. y

The. exhaust nozzle 21 has preferably located in its mouth a cone mounted upon a rod 23 so that its position may be adjusted in order to control the tlow of the exhaust steam from Ahe nozzlet' the stack.

ln order that the heat from thel [lue gases may be readil absorbed by the water, a guide 24 of approximately conical shape is disposed within the smoke box manner that the llue gases passingtoward the stae t are directed against the surface of the water chamber .3. thus facilitating the transferencefot'l heat from the flue gases to the feed water. This conical member may have at its` forward part a rent sparks and cinders being emitted from the smoke stack.

l'n operation. therefore, the water under pressure through the pipes flows S) and con-V screen 25 to pre.

nection 8 to the chamber 5, and in passing through the chamber 5 absorbs heat from the flue gases in the smoke box 3 and also from the exhaust steam passing through the two divisions of the chamber 12. The heated water is then taken from the top of the passage 5 and led through the pipe 10 and the check valve 11 into the boiler.

Having now described my invention, I claim as new and desire to secure by Letters Patent:

In a boiler ofthe locomotive type, the combination comprising cylinders, a smoke box having a stack, a water chamber formed on the exterior of and partly encirclin said 16 smoke box and disposed between the iler and the stack, an exhaust steam passage leading from one cylinder over part of said water chamber for the full length thereof and substantially encircling said smoke box, 20 and a parallel exhaust steam passage leading from the other cylinder over the remaining part of said chamber in the opposite direction.

In testimony whereof I have signed my 25 name to this specification.

JUAN DNARVARTE, N. C. 

